Method for calibrating a gyrometer fitted in an object
The calibration process for a vehicle gyrometer addresses the challenges of magnetic field inhomogeneities by measuring angular speed and magnetic field components, and using data processing to adjust calibration parameters, resulting in improved orientation and position tracking accuracy.
EP3807595B1Active Publication Date: 2025-04-02SYSNAV
18 Cites 0 Cited by
Patent Information
- Application Number
- EP2019745680
- Authority / Receiving Office
- EP · EP
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2018-06-13
- Filing Date
- 2019-06-12
- Publication Date
- 2025-04-02
- Estimated Expiration
- 2039-06-12
AI Technical Summary
Technical Problem
Existing methods for calibrating gyrometers in vehicles face challenges due to ambient magnetic field inhomogeneities and disturbances, which affect the accuracy of orientation and position tracking.
Method used
A calibration process for a gyrometer that involves measuring the angular speed and magnetic field components, using data processing to estimate calibration parameters, and adjusting for error intervals based on magnetic field conditions.
Benefits of technology
This process improves the accuracy of gyrometer calibration by accounting for magnetic field variations, leading to enhanced orientation and position tracking capabilities in vehicles.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention relates to a method for calibrating a gyrometer (11) that is fitted in an object (1) moving in an ambient magnetic field, said method involving the steps of: • (a) having the gyrometer (11) acquire a measured angular velocity, and having magnetic measurement means (20), which are secured to the object (1), acquire at least two components of the magnetic field; • (b) determining values of at least one calibration parameter of the gyrometer (11), said values minimizing a first expression defined by an estimated angular velocity of the object (1), and at least one first magnetic equation relating to the components of the magnetic field, • - the estimated angular velocity being a function of the measured angular velocity as well as of calibration parameters, and • - the at least one magnetic equation assuming that the magnetic field is uniform and stationary.
Need to check novelty before this filing date? Find Prior Art